We're all living that Asian family joke. Parents spend their whole lives waiting for their kids to thank you. Kids spend their whole lives waiting for their parent to say "I'm sorry." That said I've never felt that way about my Mom and Dad. I've faults and problems a plenty but I wouldn't ascribe any of that on them; indeed the best things about me seem to clearly come from them and the worst are just as clearly thin…
This used to be nigh unto a human universal: your parents raise you up from a helpless infant to adulthood, and this obliges you to love and care for them for the rest of their lives.
I'm as deracinated Westerner as it comes, and yet I'm fairly traditional in this regard. I can think of three acceptable reasons to estrange from parents: sexual abuse, severe physical abuse, and the parents disowning the child. Even the second one leaves a lot of room for reconciliation, since they can't hurt you anymore.
I mean, easy for me to say, my parents easily earned a B+ and I was able to work out my teen angst with my father by my mid twenties. Still: casually abandoning "honor thy father and thy mother" doesn't seem to be working out very well for us.